Fender flares also known as wheel arches are an aerodynamic product that either widens the fenders to allow for wider wheels and tires or to protect the fenders from mud and debris when installed on lifted trucks and suv's. There are a few different materials that are commonly used for manufacturing fender flares. The most common material used in aftermarket fender flares for passenger cars is FRP (fiberglass reinforced plastic). FRP fender flares are most common due to the low cost of manufacturing thus having the largest selection. These fender flares usually are installed with speed rivets for the race track look or can be molded into the vehicle for an OEM like appearance. One of the good things about FRP is that it is the most customizable and repairable of any materials used for aerodynamics. The other material that is commonly used for passenger car fender flares is carbon fiber. These flares install the same way but do not have to be painted as they come with a gloss finish. When it comes to trucks a more durable material is needed such as ABS plastic or Polyurethane. These flares are typically injection molded parts that fit the contours of the fenders perfectly and install with special hardware. ABS or Urethane flares can be installed in the natural black finish or can be painted to match the vehicle by a local auto body shop.